java打印圆

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import java.util.Scanner;public class PrintCircle{private static double r;private static double x;PrintCircle(double inr){r=inr;x=0;}public static void print(){double y=0;for(int i=5;i>=-5;i--){if(i>=0){y=r-i*r/5;System.out.print(PrintCircle.leftSpace(r-y)+"*");System.out.println(PrintCircle.midSpace()+"*");for(int j=0;j<(int)r/20;j++){System.out.println();}}else{y=r+i*r/5;System.out.print(PrintCircle.leftSpace(r-y)+"*");System.out.println(PrintCircle.midSpace()+"*");for(int j=0;j<(int)r/20;j++){System.out.println();}}}}public static String leftSpace(double y){x=Math.sqrt(r*r-y*y);String s="";for(int j=0;j<r-x;j++){   s+=" ";}return s;}public static String midSpace(){String s="";for(int j=0;j<=2*x;j++){   s+=" ";}return s;}public static void main(String[] ages){System.out.println("input半径：");Scanner sc = new Scanner(System.in);double cr  = sc.nextFloat();PrintCircle circle=new PrintCircle(cr);circle.print();System.out.println(r);}}

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